IndyCar Series drivers Marco Andretti, left, and Tony Kanaan talk as they wait to practice for the Meijer Indy 300 auto...

Marco Andretti is seen after being knocked out of the race during the 93rd running of the Indianapolis...

Sam Hornish Jr., front, pumps his fist after his pass of Marco Andretti on the run to the checkered flag, for victory in the Indianapolis 500 auto race at...

Sam Hornish Jr., left, pumps his fist as he beats Marco Andretti to the finish line to win the 90th running of the Indianapolis 500 auto race, at...

Driver Marco Andretti points to the front of his car as he talks with his grandfather Mario Andretti before...

IRL drivers Dan Wheldon, left, and Marco Andretti talk before the start of car testing at the IRL Spring Training in Homestead, Fla., Wednesday...

Tony Kanaan, left, of Brazil, talks about the track with teammate Marco Andretti, right, following practice laps for the IndyCar Series' Iowa Corn Indy 250 auto race, Saturday, June...

Drivers of Andretti Green Racing, from left, Danica Patrick of the U.S., Tony Kanaan of Brazil, Marco Andretti of the U.S., Hideki Muto of Japan...

Teammates, from left, Danica Patrick, Tony Kanaan, of Brazil, and Marco Andretti chat during the traditional drivers meeting for Sunday's Indianapolis 500 auto race at the Indianapolis...

Marco Andretti looks over the Kentucky Speedway track as his father, Michael, waits in the background prior to...

Race drivers Marco Andretti, left, and Danica Patrick wait for the start of practice on the final day of qualifications...

In this May 10, 2008 file photo, race driver Marco Andretti, left, his father and car owner Michael Andretti, right, and his grandfather Mario Andretti talk in...

The car of IRL driver Marco Andretti breaks apart as he hits the wall after colliding with Ryan Briscoe at the IndyCar Series...

IRL driver Marco Andretti raises the winner's trophy after winning the Indy Grand Prix of Sonoma Sunday, Aug. 27...

...Target Chip Ganassi Racing Dallara Honda celebrates with second placed Helio Castrones (L) and third placed Marco Andretti (R) after winning the IndyCar Series Meijer Indy 300 on August 9, 2008 at the Kentucky...